红外与激光工程, 2019, 48 (11): 1105002, 网络出版: 2019-12-09
级联Nd:GdVO4自拉曼1 309 nm激光性能研究
Study on the performance of cascaded Nd:GdVO4 self-Raman laser at 1 309 nm
固体激光器 Nd:GdVO4晶体 级联拉曼 声光调Q solid-state lasers Nd:GdVO4 crystal cascaded Raman acousto-optic Q-switched
摘要
报道了基于半导体激光端面抽运的a切Nd:GdVO4晶体级联自拉曼激光的输出特性。利用Nd:GdVO4晶体的优异激光特性和较强的拉曼增益, 结合使用针对级联拉曼设计的宽带高反腔镜, 在声光Q开光调制下, 成功实现了基于882 cm-1频移的1 309 nm波长二阶斯托克斯激光输出。在10 W入射抽运功率和50 kHz重复频率下, 获得了平均输出功率1.48 W, 脉冲宽度5.3 ns的1 309 nm激光输出, 对应的二阶斯托克斯激光阈值和光光转换效率分别为5.9 W和14.8%。结果表明: 以Nd:GdVO4作为自拉曼晶体, 通过级联拉曼可实现高效二阶斯托克斯激光输出, 对丰富固体激光波长具有重要价值。
Abstract
The output characteristics of a-cut Nd:GdVO4 crystal cascaded self-Raman laser based on semiconductor laser end-pumping were reported. Making full use of the excellent laser characteristics and strong Raman gain of Nd:GdVO4 crystal, as well as using broadband high-reflection mirror designed for cascaded Raman operation, second order Stokes laser at 1 309 nm based on the Raman shift of 882 cm-1 was successfully achieved under the acousto-optic Q-switched modulation. Under the incident pump power of 10 W and the pulse repetition frequency of 50 kHz, a maximum average Raman laser output power of 1.48 W and a pulse width of 5.3 ns for 1 309 nm laser was obtained, corresponding the threshold and the conversion efficiency for second order Stokes generation were around 5.9 W and 14.8%, respectively. The results show that cascaded Nd:GdVO4 self-Raman also can achieve high-efficiency second-Stokes laser output, which is of great value to enrich the wavelength of solid-state laser.
张喜梅, 陈思梦, 施沈城, 周青青, 段延敏, 朱海永. 级联Nd:GdVO4自拉曼1 309 nm激光性能研究[J]. 红外与激光工程, 2019, 48(11): 1105002. Zhang Ximei, Chen Simeng, Shi Shencheng, Zhou Qingqing, Duan Yanmin, Zhu Haiyong. Study on the performance of cascaded Nd:GdVO4 self-Raman laser at 1 309 nm[J]. Infrared and Laser Engineering, 2019, 48(11): 1105002.